TAODAN 20PCS Aquarium Air Tubing Accessories Non Return Valves Aquarium Air Pump Check Valves Plastic One Way Non Return Check Valve Air Pump Accessories for Fish Tank, Black

Product Description: Color: Black Material: Made of high-quality plastic, durable and sturdy, not easily broken, ensuring long-term use. Removable design: Easy disassembly, cleaning, and maintenance without the use of tools. Please insert something into the hole to poke it open when blocking and restricting airflow. Only for oxygen pumps: excellent one-way check valve for most common Aquarium air pumps. Do not use them in CO1 or other high-pressure systems to avoid cracking or leakage. Packaging includes: 20 aquarium air pump check valves, black